Algeria’s imminent presidential election looks likely to be postponed, a source said on Friday, as protesters returned to the streets for the 13th successive Friday to demand the removal of the nation’s ruling elite. After two decades in power, President Abdelaziz Bouteflika quit last month under pressure from protesters and the army, and a presidential election is scheduled for July 4. But a source familiar with the matter said the vote was to be delayed due to difficulties of organizing the logistics in time and opposition on the street.